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https://www.readbyqxmd.com/read/29140178/infraspinatus-cross-sectional-area-and-shoulder-range-of-motion-change-following-live-game-baseball-pitching
#1
Brett S Pexa, Eric D Ryan, Elizabeth E Hibberd, Elizabeth Teel, Terri Jo Rucinski, Joseph B Myers
CONTEXT: Following a baseball pitching bout, changes can occur to glenohumeral range of motion that could be linked to injury. These effects are in part due to the posterior shoulder's eccentric muscle activity, which can disrupt muscle contractile elements and lead to changes in muscle cross sectional area (CSA), as measured by ultrasound. OBJECTIVE: To assess changes in muscle CSA, and range of motion immediately before and after pitching, and days 1-5 following pitching...
November 15, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29112626/effects-of-ad-libitum-low-carbohydrate-high-fat-dieting-in-middle-age-male-runners
#2
Alexander J Heatherly, Lauren G Killen, Ashton F Smith, Hunter S Waldman, Angela Hollingsworth, Christie L Seltmann, Eric K O'Neal
PURPOSE: This study examined the effects of a 3-week ad libitum high fat (~70% of calories), low carbohydrate (<50 g/day) diet (LCHF) on markers of endurance performance in middle-aged, recreationally competitive male runners. METHODS: All subjects (n = 8) following their normal HC diet had anthropometric measures assessed and completed 5, 10-min running bouts at multiple individual race paces in the heat while physiological, metabolic variables and perceptual responses were recorded...
November 6, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29106812/whey-protein-hydrolysate-supplementation-accelerates-recovery-from-exercise-induced-muscle-damage-in-females
#3
Meghan A Brown, Emma J Stevenson, Glyn Howatson
A number of different forms of protein and their analogues have been investigated for their efficacy in ameliorating exercise-induced muscle damage (EIMD) and recovery. Preliminary data regarding whey protein hydrolysate (WPH) supplementation are promising. However, its efficacy beyond acute eccentric/resistance exercise bouts or longer-term training programmes are limited and all investigations have been conducted in male or mixed-sex groups. This study sought to elucidate whether the benefits of WPH previously reported can be demonstrated in females following repeated-sprint exercise...
November 6, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29091464/effect-of-four-weeks-ingestion-of-tomato-based-carotenoids-on-exercise-induced-inflammation-muscle-damage-and-oxidative-stress-in-endurance-runners
#4
David C Nieman, Courtney L Capps, Christopher R Capps, Zack L Shue, Jennifer E McBride
This double blind, randomized, placebo controlled crossover trial determined if ingestion of a supplement containing a tomato extract with 11 mg lycopene, phytoene, and phytofluene (T-LPP) for 4 weeks would attenuate inflammation, muscle damage, and oxidative stress post-exercise and during recovery from a 2-h running bout that included 30 minutes of -10% downhill running. Study participants ingested the T-LPP supplement or placebo with the evening meal for 4 weeks prior to running 2 h at high intensity. Blood samples and delayed-onset of muscle soreness (DOMS) ratings were taken pre- and post-4-weeks supplementation, and immediately following the 2-h run, and then 1-h-, 24-h-, and 48-h post-run...
November 1, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29084097/differential-effects-of-different-warm-up-protocols-on-repeated-sprints-induced-muscle-damage
#5
Che-Hsiu Chen, Xin Ye, Yi-Tse Wang, Yung-Sheng Chen, Wei-Chin Tseng
The purpose of this investigation was to examine whether adding a set of hamstring resistance exercise or dynamic stretching to a regular running-based warm-up before a bout of repeated sprints provides protective effects against the sprinting-induced muscle damage. Twelve elite tennis players participated in this study. After the familiarization, subjects completed 3 separate randomly sequenced experimental visits, during which 3 different warm-up interventions were performed before the muscle-damaging protocol (12 sets of 30-m maximal repeated sprints): 5 minutes of running (control); control with single leg slide curl (SLC); and control with active hamstring stretching (AHS)...
October 27, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29077637/contralateral-repeated-bout-effect-of-the-knee-flexors
#6
Trevor C Chen, Ming-Ju Lin, Hsin-Lian Chen, Hui-Yi Yu, Kazunori Nosaka
PURPOSE: Eccentric exercise of the elbow flexors (EF) confers protective effect against muscle damage of the same exercise performed by the opposite arm at 1, 7 or 28 days later. This is known as the contralateral repeated bout effect (CL-RBE), but it is not known whether CL-RBE is evident for the knee flexors (KF). The present study tested the hypothesis that KF CL-RBE would be observed at 1, 7 and 28 days after the initial bout. METHODS: Young untrained men were assigned to a control or one of three experimental groups (n=13/group)...
October 26, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29063376/recurrent-heat-shock-impairs-the-proliferation-and-differentiation-of-c2c12-myoblasts
#7
Daniel J Bolus, Gobinath Shanmugam, Madhusudhanan Narasimhan, Namakkal S Rajasekaran
Heat-related illness and injury are becoming a growing safety concern for the farmers, construction workers, miners, firefighters, manufacturing workers, and other outdoor workforces who are exposed to heat stress in their routine lives. A primary response by a cell to an acute heat shock (HS) exposure is the induction of heat-shock proteins (HSPs), which chaperone and facilitate cellular protein folding and remodeling processes. While acute HS is well studied, the effect of repeated bouts of hyperthermia and the sustained production of HSPs in the myoblast-myotube model system of C2C12 cells are poorly characterized...
October 24, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/29040872/highly-elevated-plasma-level-of-von-willebrand-factor-accelerates-the-formation-of-platelet-thrombus-under-high-shear-stress-in-plasma-with-deficient-adamts13-activity
#8
Hideo Yagi, Naoko Yamaguchi, Yasuaki Shida, Mitsuhiko Sugimoto, Kazuo Tubaki, Yoshihiro Fujimura, Masanori Matsumoto
Upshaw-Schulman syndrome (USS) is a thrombo-hemorrhagic disease caused by congenital deficiency of ADAMTS13 due to ADAMTS13 gene mutations. USS is characterized by repeated episodes of thrombocytopenia and microangiopathic hemolytic anemia that respond dramatically to infusions of fresh frozen plasma. There are two phenotypic expressions of USS: one is the early-onset type and the other, the late-onset type, is asymptomatic during childhood with the first bout of thrombotic thrombocytopenic purpura (TTP) developing after adolescence or during adulthood...
October 10, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/29018989/effects-of-prior-aerobic-exercise-on-sitting-induced-vascular-dysfunction-in-healthy-men
#9
Kevin D Ballard, Robert M Duguid, Craig W Berry, Priyankar Dey, Richard S Bruno, Rose Marie Ward, Kyle L Timmerman
INTRODUCTION: Acute aerobic exercise prevents sitting-induced impairment of flow-mediated dilation (FMD). Further, evidence suggests that sitting-induced impairment of FMD occurs via an oxidative stress-dependent mechanism that disrupts endothelial function. PURPOSE: We hypothesized that acute aerobic exercise would prevent impairment of femoral artery FMD by limiting oxidative stress responses that increase endothelin-1 (ET-1) levels and disrupt nitric oxide (NO) status...
October 10, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28978542/consumption-of-whole-eggs-promotes-greater-stimulation-of-postexercise-muscle-protein-synthesis-than-consumption-of-isonitrogenous-amounts-of-egg-whites-in-young-men
#10
Stephan van Vliet, Evan L Shy, Sidney Abou Sawan, Joseph W Beals, Daniel Wd West, Sarah K Skinner, Alexander V Ulanov, Zhong Li, Scott A Paluska, Carl M Parsons, Daniel R Moore, Nicholas A Burd
Background: Protein in the diet is commonly ingested from whole foods that contain various macro- and micronutrients. However, the effect of consuming protein within its natural whole-food matrix on postprandial protein metabolism remains understudied in humans.Objective: We aimed to compare the whole-body and muscle protein metabolic responses after the consumption of whole eggs with egg whites during exercise recovery in young men.Design: In crossover trials, 10 resistance-trained men [aged 21 ± 1 y; 88 ± 3 kg; body fat: 16% ± 1% (means ± SEMs)] received primed continuous l-[ring-(2)H5]phenylalanine and l-[1-(13)C]leucine infusions and performed a single bout of resistance exercise...
October 4, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28963315/reducing-steroids-in-relapsing-nephrotic-syndrome-the-restern-study-protocol-of-a-national-double-blind-randomised-placebo-controlled-non-inferiority-intervention-study
#11
A M Schijvens, E M Dorresteijn, N Roeleveld, R Ter Heine, J A E van Wijk, A H M Bouts, M G Keijzer-Veen, N C A J van de Kar, L P W J van den Heuvel, M F Schreuder
INTRODUCTION: Oral corticosteroids are the first-line treatment for idiopathic childhood nephrotic syndrome. Most children experience several relapses, needing repeated courses of corticosteroid therapy. This exposes them to side effects and long-term complications. For most patients, long-term prognosis is for complete resolution of the disease over time and maintenance of normal kidney function. Therefore, it is vital to focus on minimising adverse events of the disease and its therapy...
September 27, 2017: BMJ Open
https://www.readbyqxmd.com/read/28952829/mental-fatigue-and-physical-and-cognitive-performance-during-a-two-bout-exercise-test
#12
Susan Vrijkotte, Romain Meeusen, Cloe Vandervaeren, Luk Buyse, Jeroen van Cutsem, Nathalie Pattyn, Bart Roelands
PURPOSE: The two bout exercise protocol has been developed to diagnose non-functional overreaching (NFO) and the 'Overtraining Syndrome' (OTS). It consists of two maximal exercise bouts separated by 4 hours. Mental fatigue negatively influences performance but the effects of its occurrence during the two bout exercise protocol have never been investigated. The aim of this study was to examine whether mental fatigue (induced during the rest period) influences physical and cognitive performance during/after the second exercise bout of the two bout exercise protocol...
September 27, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28940037/satellite-cell-activation-and-mtor-signaling-pathway-response-to-resistance-and-combined-exercise-in-elite-weight-lifters
#13
Chang Hyun Lim, Thien Suong Luu, Le Quy Phoung, Tae Seok Jeong, Chang Keun Kim
PURPOSE: Our aim was to compare the effects of a single exercise training mode (resistance exercise) with a combined exercise training (resistance and plyometric exercise) mode on satellite cell activity and anabolic signaling at the molecular level. METHODS: Eighteen male weight lifters (20 ± 4 years, BMI 27 ± 6 kg/m(2)) were randomly assigned to either a series of resistance exercise or a series of combined exercise group. The intensity of the exercise was set at 60% of their 1 RM weight and subjects completed three sets each of six repetitions...
November 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28936416/effect-of-wheelchair-design-on-wheeled-mobility-and-propulsion-efficiency-in-less-resourced-settings
#14
Christopher J Stanfill, Jody L Jensen
BACKGROUND: Wheelchair research includes both qualitative and quantitative approaches, primarily focuses on functionality and skill performance and is often limited to short testing periods. This is the first study to use the combination of a performance test (i.e. wheelchair propulsion test) and a multiple-day mobility assessment to evaluate wheelchair designs in rural areas of a developing country. OBJECTIVES: Test the feasibility of using wheel-mounted accelerometers to document bouts of wheeled mobility data in rural settings and use these data to compare how patients respond to different wheelchair designs...
2017: Afr J Disabil
https://www.readbyqxmd.com/read/28930874/the-effectiveness-of-fish-oil-supplementation-in-attenuating-exercise-induced-muscle-damage-in-females-during-mid-follicular-and-mid-luteal-menstrual-phases
#15
Sarah K McKinley-Barnard, Thomas L Andre, Josh J Gann, Paul S Hwang, Darryn S Willoughby
The purpose of this study was to determine if the differences in estrogen levels during the female menstrual cycle and fish oil supplementation would attenuate eccentric exercise-induced muscle damage (EIMD) and delayed onset muscle soreness (DOMS). In a double-blind fashion, 22 physically-active females (20.9 ± 1.4 years, 63.5 ± 9.0 kg, 165.2 ± 7.5 cm) were randomly assigned to ingest either 6 grams of fish oil (n = 11) or placebo (n = 11) daily for 21 days. Participants underwent an eccentric exercise bout of the knee extensors on two occasions during the mid-follicular (MF) and mid-luteal (ML) phases of the 28-day menstrual cycle...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28929936/time-course-of-the-acute-effects-of-core-stabilisation-exercise-on-seated-postural-control
#16
Jordan B Lee, Stephen H M Brown
Core stabilisation exercises are often promoted for purposes ranging from general fitness to high-performance athletics, and the prevention and rehabilitation of back troubles. These exercises, when performed properly, may have the potential to enhance torso postural awareness and control, yet the potential for achieving immediate gains has not been completely studied. Fourteen healthy young participants performed a single bout of non-fatiguing core stabilisation exercise that consisted of repeated sets of 2 isometric exercises, the side bridge and the four-point contralateral arm-and-leg extension...
September 20, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28922065/a-study-examining-the-effect-of-a-short-bout-of-postprandial-walking-on-the-glycemic-effect-of-a-meal-type-1-diabetes
#17
Samantha L Hinojosa, Cynthia J Heiss
OBJECTIVE: The purpose of this pilot study was to determine whether 15 minutes of postprandial walking has an effect on the glycemic response to a breakfast beverage in individuals with type 1 diabetes (T1DM). METHODS: Seven participants, aged 22.3 ± 4.3 years, with T1DM using intensive insulin therapy completed 2 days of data collection. On day 1, participants measured baseline fasting blood glucose (BG) with a glucometer, consumed an 8-ounce Boost® beverage (41 grams carbohydrate), administered a bolus of insulin according to the carbohydrate load and fasting BG, and sat quietly, repeating BG measurements 15, 30, 60, 90, and 120 minutes after consumption...
September 18, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28912629/spinal-manipulation-does-not-affect-pressure-pain-thresholds-in-the-absence-of-neuromodulators-a-randomized-controlled-trial
#18
Max K Jordon, Paul F Beattie, Sarah D'Urso, Sarah Scriven
BACKGROUND: Measurement of pressure pain threshold (PPT) is a way to determine one of the many potential treatment effects of spinal manipulative therapy. OBJECTIVE: To determine how multiple spinal manipulations administered in a single-session affected PPTs at local and distal sites in asymptomatic individuals. METHODS: Participants were randomly assigned into one of three groups: Group one (n = 18) received a lumbar manipulation followed by a cervical manipulation...
September 2017: Journal of Manual & Manipulative Therapy
https://www.readbyqxmd.com/read/28902113/comparative-effects-of-two-interval-shuttle-run-training-modes-on-physiological-and-performance-adaptations-in-female-professional-futsal-players
#19
Anderson S Teixeira, Francimara B Arins, Ricardo D De Lucas, Lorival J Carminatti, Naiandra Dittrich, Fábio Yuzo Nakamura, Luiz Guilherme A Guglielmo
The purpose of the present study was to analyze the effects of two shuttle-run interval training (SRIT) models with one and three directional changes per running bout on the aerobic and anaerobic performances of elite female futsal players. Sixteen players competing in the Brazilian National Division League took part in the study. The training protocols consisted of shuttle-run intervals organized in four sets of 4-min bouts with 3- min of rest intervals between the sets. The SRIT models were composed of one (7...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28860165/influence-of-nutrient-ingestion-on-amino-acid-transporters-and-protein-synthesis-in-human-skeletal-muscle-after-sprint-exercise
#20
Håkan Claes Rundqvist, Mona Esbjörnsson, Olav Rooyackers, Ted Osterlund, Marcus Moberg, William Apró, Eva Blomstrand, Eva Jansson
Nutrient ingestion is known to increase the exercise-induced stimulation of muscle protein synthesis following resistance exercise. Less is known about the effect of nutrients on muscle protein synthesis following sprint exercise. At two occasions separated by one month, twelve healthy subjects performed three 30-s sprints with 20-min rest between bouts. In randomized order, they consumed a drink with essential amino acids and maltodextrin (nutrient) or flavored water (placebo). Muscle biopsies were obtained 80 and 200 min after the last sprint and blood samples were taken repeatedly during the experiment...
August 31, 2017: Journal of Applied Physiology
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